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I can only tell you what a mechanic told me about my Hyundai (also a '97). He checked the car out thoroughly and there were no problems. He said that sometimes they manufacture the vehicles so that the check engine light will come on at a certain mileage or after so many years have passed, to have the customer go in for repairs or check ups. My mechanic turned it off, but it came back on later. It has no problems he could find. The Check Engine Light comes on when the computer detects a problem with the emissions system. It can be as simple as a loose gas cap, bad spark plugs, or as serious as a bad catalytic converter. One common cause is a bad O2 sensor. Have the computer scanned to retrieve the fault code. That code will help to lead you to the problem. If you have not replaced the plugs and plug wires on this vehicle, that would be a good place to start, especially if it has over 75,000 miles.

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โˆ™ 2006-03-09 17:03:37
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Q: Why does check engine light come on in 1997 Ford Aerostar Van?
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